研究目的
To demonstrate the reversible 3D patterning of perovskite quantum dots inside a transparent glass medium using a femtosecond laser for applications in high-capacity optical data storage, information encryption, and 3D artwork.
研究成果
The study demonstrates the reversible in situ fabrication and decomposition of CsPbBr3 QDs inside a transparent glass medium using a femtosecond laser. This technique allows for the printing of complex patterns in a 3D fashion and has potential applications in high-capacity optical data storage, information security, and 3D commercial artwork.
研究不足
The surface roughness caused by microcracks or a change of refractive index in the laser-induced regions may need optimization of the glass matrix quality and femtosecond laser parameters. The minimum irradiation time for laser writing and erasing could be further decreased by compositional modulation of the glass matrix and optimization of the femtosecond laser parameters.
1：Experimental Design and Method Selection:
A femtosecond laser with a central wavelength of 800 nm, pulse duration of 150 fs, and repetition rate of 1 kHz was used to construct 3D structures of CsPbBr3 QDs inside glass. The laser was focused 500 μm beneath the glass surface through a 10× objective lens.
2：Sample Selection and Data Sources:
Oxide glass matrix containing caesium, lead, and bromine elements was designed for laser patterning of CsPbBr3 QDs.
3：List of Experimental Equipment and Materials:
Femtosecond laser, objective lens, computer-controlled 3D XYZ translation stage, glass samples.
4：Experimental Procedures and Operational Workflow:
The glass samples were irradiated by the femtosecond laser, followed by annealing at 350 °C for crystallization of CsPbBr3 QDs. The QDs could be erased by further laser irradiation and recovered by annealing.
5：Data Analysis Methods:
Optical microscope images, fluorescent images, PL spectra, TEM images, Raman spectra, and absorption spectra were collected and analyzed.
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